code: def _ccorr(self, a, b):
      a = self._conj(torch.rfft(a, signal_ndim=1, onesided=False))
      b = torch.rfft(b, signal_ndim=1, onesided=False)
      res = self._mul(
          self._real(a), self._imag(a), self._real(b), self._imag(b)
      )
      res = torch.ifft(res, signal_ndim=1)
      return self._real(res).flatten(start_dim=-2)
  
file_path: OpenKE/openke/module/model/HolE.py
imports: import torch
  import torch.nn
  from .Model import Model
  import numpy
  from numpy import fft
label_desc: Use image node_id 6 for calling the HolE obj's underlying member method code with example usage: obj._ccorr(a, b) and returns: self